I have the option of either using a vertical or horizontal bobbin for a flyback SMPS transformer, and I can't conclusively decide which would be best for minimal radiated interference to be picked up ...

I have a broken Philips alarm clock FM/AM radio broken, so I stripped some parts out of it.
One of it seems like an AC converter, but I cannot find any reference/datasheet about it. Do you have any ...

I am looking for a way to limit AC current.
The application I have is used to remove the heat tint on stainless steel caused by welding (the blue-ish discoloration). Removing the tint is achieved by ...

Firstly I am not at all experienced in electrical matters so forgive any wrong terminology.
Here's the situation:
I recently moved out of US to a country that uses 220v. We have a single phase step-...

I am trying to wind my own transformer for a power supply. How many turns do I need on my primary winding?
I know that the turn ratio determines the voltage ratio, but how do I determine the actual ...

Looks like one of the major problems of wireless energy transfer is efficiency. For example, Magne Charge high power charging system seems to have about 86% efficiency which means that quite a lot of ...

If you refer to Figure 14 of http://www.analog.com/media/en/technical-documentation/application-notes/EE-269.pdf. There are 2 transformers on each data pair. Can someone help explain how they work? ...

In class, we were given equations for the transformer in terms of number of turns primary/secondary and coupling coefficient K, however effect of distance between coils, presence/absence of core, and ...

I came across Beware of Zero-Crossover Switching of Transformers (TE Connectivity App Note) where they discuss about how you shouldn't switch a transformer at the zero crossing because it would have ...

If transformer is coil (primary and secondary), then when we connect ac source across primary winding which is a nothing but a coil, so entire coil impedance will come across ac source and it will be ...

I'm trying to understand the physical meaning on Insertion Loss and Return Loss on a transformer, specifically RF transformers.
The values are often quoted as figures of merit in datasheets, but I'm ...

I recently acquired an early model Vic 20 computer but don't have a power supply for it and thought I might be able to make one. The Vic 20 is the early model with the two pin AC connector - not the ...

This weekend a very close lightning strike took out several devices in my house. Among the casualties were:
2 TVs
1 cable modem
1 cable box
1 garage door opener
One of the TVs, the cable modem, and ...

I would like to model a transformer in LTspice with hysteresis and saturation (or just hysteresis would be nice). I have already tried the Chen model which I don't like and tried to model a regular ...

Does it matter whether I wind the primary or the secondary first? I imagine with the primary inside the secondary you'll have less leakage. Is that right? Other reasons to put the primary or secondary ...

I'm studying LTSpice, and I'm playing in transformer simulation. I want to modelize a real world power line transformer in a reasonable way: I mean I don't need an exact simulation of some specific ...

Unfortunately, this post requires quite a bit of background if it's going to be useful to anybody (including me).
I have been trying to build a relatively high voltage power converter for part of my ...

When a transformer has the secondary open and it's driven by an AC source, the only current that the primary draws is the current needed to produce the flux to magnetize the core (like ferrite) of the ...

Assume that I have a 220 to 12 volts transformer with a nominal output current of 3 A (marked "12 V 3 A"). Now what does happen if I connect the two output wires to each other or to a load with very ...

About the amp:
This is from an old solid state audio amplifier with an AM/FM tuner. No digital parts or ICs were inside. It was all point to point. Unfortunately I threw out the amp and didn't write ...

For a small 24V 1A transformer where should I place the fuse? Secondary 1A fuse or primary 100mA fuse (or above accounting for inrush current)? Mains is 230V. Also, the smallest fuse available in the ...

I have a center tap transformer that does 110 or 220VAC stepdown to two 6V rails (with opposing phases). On the 110/220 side there are what appear to be two separate rails, and the wiring diagram is a ...

I see every day high voltage, high current; high voltage, low current. I rarely see low voltage, high current; why?
I know that I can take a high voltage, high current signal, send it through a step-...